Saturday, 26 April 2025

Hyundai ME17.9.21.1 ECU Idle Speed Repair by OBDSTAR DC706

This guide will walk you through how to use the OBDSTAR DC706 ECU Tool to perform data reading/writing and idle speed repair on a Hyundai Bosch ME17.9.21.1 ECU.


Tools Required:

OBDSTAR DC706 (X300 Classic G3 is also supported)

High-power DC regulated power supply

Main cable

ECU Clone Jumper

MP001 Programmer

Hyundai ME17.9.21.1 ECU


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Step-by-Step Instructions:


1. Preparation

Before proceeding, ensure that the software is upgraded to the latest version.

Launch the [ECU Flasher] software and select Passenger Car [ECM].


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2. Model Search

Use the search box in the upper right corner to quickly locate the corresponding ECU model.


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3. Review the Guide

Open the [Guide] section and carefully read through:


Warm reminders

Function descriptions

Operation instructions

Connection methods

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4. Connector Pinout

Open the [Connector Pinout] section and connect the hardware according to the provided diagrams.


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5. Start the Process

After completing the physical connection, tap [Start].


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6. ECU Connection and Data Backup

Establish a connection to the ECU.


Perform a full data backup immediately.


File names can be customized for easy identification.


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7. Data Writing

Write the previously backed-up data back into the ECU module.


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8. Idle Speed Repair

Tap on [Idle Speed Repair].


Once the operation is completed, reinstall the ECU module into the vehicle.

After repair, the normal idle speed will be stabilized between 800–850 RPM.


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By following these steps carefully, you can ensure that the Hyundai ME17.9.21.1 ECU is properly repaired and operating at optimal idle speed.


Video guides:


www.obd2shop.co.uk

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